A Virgin flight from the US to Australia was forced to turn around, after leakage from the bathroom stank out the plane to such an extent that no one could bear the smell any longer.
There's some debate as to exactly what kind of stinky stuff was leaking out, though. One passenger told a radio show it was clearly human waste due to the extreme stink, saying: "The bathroom just exploded, I'm not even exaggerating."
A Virgin spokesperson, however, said it was only the taps that were leaking, despite the stink, saying: "Reports of human waste in the aisle are incorrect. The safety of the aircraft was never in question." [Independent]